Wheel blocking device



April 1, 1947. H. SAX 51' AL 2,418,279

WHEEL BLOCKING DEVICE Filed NOV. 19, 1945 INVENTORS.

HERMAN SAX I LEROY J P0X ATTORNEYS.

Patented Apr. 1, 1947 UNITED STATES PATENT OFFICE.

2,418,279 WHEEL BLOCKING DEVICE Herman Sax and Leroy J. Fox, Chicago, 111., as-

signors to Modern Devices, Inc., Chicago, 111., a corporation of Illinois Application November 19, 1945, Serial No. 629,520

2 Claims.

Our invention relates to devices which are applicable to a motor car wheel to lock the same from rolling while a tire is being changed with the aid of a bumper jack. Often a car raised by such a jack-and therefore pivoted on a single post-is insecurely poised and easily subject to falling and rolling, particularly when the road is sloping or crowned.

While blocking devicessometimes called chockshave been designed in one form or another to lock cars against rolling in instances of the character mentioned, it is one object of the present invention to provide a device which is readily applicable and easily adjustable to wheels of different conventional sizes.

Another object is to design the novel blocking device along lines of simplicity, ruggedness and compactness, in order that it may be cheaply produced, roughly handled, and carried along with tools or other accessories in the luggage compartment of the car.

With the above objects in view and any others which may suggest themselves from the description to follow, a better understanding of the invention may be had by reference to the accompanying drawing, in which Fig. 1 is a side elevation of the device, showing a motor car wheel blocked therein;

Fig. 2 is an enlarged duplication of the device alone;

Fig. 3 is a top plan view; and

Fig. 4 is a section on the line 4-4 of Fig. 3.

In accordance with the foregoing, specific reference to the drawing shows the device to be mainly in the form of a U-shaped frame I0, the material thereof being sturdy strap iron stock.

Two beveled wood blocks II and I2 are designed to be transversely positioned in the frame 10, the bevels of the blocks facing each other. The block 11 is located in the inner portion of the frame and is slidable longitudinally thereof through the agency of a pair of screws 13. These pass freely through longitudinal slots I4 in the side bars I5 of the frame and are driven into the sides of the block as indicated at 16. The sliding of the block is induced by threading a screw I'I through the inner end of the frame. The outer end of the screw is in the form of an eye l8, while the inner end thereof turns freely in a retainer I9 embedded in the outer end of the block.

The block l2 also receives a pair of screws 20 from the side, but the shanks of these are designed to enter a selected pair of oblique slots 21 forming part of a series cut from the bottom in the free end portions of the side bars I5.

When the device is to be applied to block up a motor car wheel, the block I2 is first removed, in order that the corresponding end of the frame Ill may be open. The frame is now slid on the ground to receive the bottom portion of the inflated wheel tire between the frame side bars I5. The leading ends of these are now raised and the block I3 inserted to the position of Fig. 2, the nearest pair of slots 2| being chosen to receive the screws 20 according to the size of the tire. The number and positions of the slots are calculated to suit the most popular or common tire sizes. With the wheel positioned between the blocks II and 12, the screw 11 is rotated to advance the block II until it bears firmly on the wheel tire, causing the wheel to be firmly clamped or blocked-in between the blocks II and. I2. It is now impossible for the wheel to roll, and the motor car will hold its place while the jack IS in the lifting, standing or lowering positions.

It will be evident from the above description that the blocks I I and I2 are employed in a novel arrangement. Thus, the frame II] is of the simplest and most suitable form for application to the bottom portion of the wheel, being closed where the permanent block II occurs and open where the removable one is applicable. After the block l2 has been engaged to locate both blocks closely adjacent to the inflated wheel tire,

the eye I8 is in a handy position to be rotated until the blocks secure a good clamping grip on the wheel, the screw forming a centered control to apply the block II evenly. Further, the parts making up the device are few and simple; and the entire device is sufficiently light and compact to A be handled with ease and kept with other tools We claim:

1. A wheel blocking device comprising a U- shaped frame adapted to be placed over the wheel to be blocked, a block slidably guided by the frame longitudinally thereof, an operating screw threadedly engaging the bight portion of said frame and rotatably engaging said block, another block adjustable in said frame, pairs of oblique notches in the legs of said frame and directed toward the bight part thereof and opening through one side thereof, screws threaded in the sides of said other block and adapted for insertion into a, corresponding pair of said notches to hold said other block in a selected position.

2. A wheel blocking device comprising a U- shaped .frame adapted to be placed over the wheel to be blocked, a block slidably guided by the frame longitudinally thereof, an operating screw threadedly engaging the bight portion of said frame, a retainefrotatably connecting said screw to said block, another block adjustable in said frame, pairs of oblique notches in the legs -Number Name Date 472,997 Hayward Apr. 19, 1892 FOREIGN PATENTS Number Country Date 1,066 British Jan. 15, 1896 355,872 German July 8, 1922 French May 13, 1913 of said frame and directed toward the bight part thereof and opening through one side thereof, screws threaded in the sides of said other block and adapted for insertion into a corresponding pair of said notches to hold said other block in a selected position.

HERMAN SAX. LEROY J. REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

